Hi guys

I am compiling some c++ code trying to connect it with

libi2cbrdg.a

library where I have a lot of functions. So when I am doing this

gcc -g rand.c -lasound -li2cbrdg -o rand.o

I don't have missed functions instead I have some other C/C++ connected errors, when I am using g++ compiler like this

g++ -g rand.c -lasound -li2cbrdg -o rand.o

it does not see functions inside that library but everything fine with c++ code.

How can I make g++ behave like gcc in this case?

Hey,

it sounds like you hit a name mangling issue. When using g++, you call the C++ compiler (cc1cplus), while you call the C compiler (cc1) when using gcc. Though with the C++ compiler, if you call a function like

int func(int, long int)

from your code, the C++ compiler will name mangle the symbol and finally tries to call a function named

_Z4funcil

which the linker then couldn't find in the libraries, because the libraries only have the function symbol 'func'. Though, if you really have C++ code in your source file rand.c, you should first of all change the extension to .cpp or .cc to make it in general clearer that this is C++ code. Then you should check the prototypes of the library functions and surround them by a

extern "C" {

<function prototypes>
}

This instructs the C++ compiler to NOT name mangle the functions listed in the extern "C" block.

I hope this is what you're searching for, otherwise, please post your concrete error message with a small source code example ...

- Andi -

Cool Thanks, problem solved